|
Type |
Poster Presentation |
Area |
무기화학 |
Room No. |
포스터발표장 |
Time |
4월 21일 (금요일) 13:00~14:30 |
Code |
INOR.P-91 |
Subject |
Zinc(II) Complexes Containing N'-Substituted N,N-Bispyrazolyl Ligands: Application to Polymerizations of methyl methacrylate and Lactide |
Authors |
조형우, 이효선1,* 경북대학교 화학과, Korea 1경북대학교 자연과학대학 화학과, Korea |
Abstract |
New complexes [LnZnCl2] (Ln = LA – LE) were synthesized by the reaction of [ZnCl2] with N,N-bis((1H-pyrazol-1-yl)methyl)-2,6-dimethylbenzenamine (LA), N,N-bis((1H-pyrazol-1-yl)methyl)-4-bromobenzenamine (LB), N,N-bis((1H-pyrazol-1-yl)methyl)benzhydrylamine (LC), N,N-bis((1H-pyrazol-1-yl)methyl)cyclohexylmethylamine (LD), N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)cyclohexylmethylamine (LE), respectively. Zn(II) complexes were characterized by 1H-NMR, 13C-NMR, IR, and elemental analyzer. The catalytic properties of these complexes toward the polymerization of methyl methacrylate (MMA) and racemic lactide were investigated. [LCZnCl2] showed the highest catalytic activity for the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 3.95 × 104 g PMMA/molcat•h at 60oC. Methylated Zn(II) complexes were employed and evaluated as an initiator for ROP of rac-Lactide. The heterotactic polylacticacid (PLA) with Pr up to 79 % can be obtained in CH2Cl2 at -50oC. |
E-mail |
hyungwoo4@naver.com |
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